True or False: With the exception of water, all liquids expand in direct proportion to their change in temperature when heated.

The statement is false because not all liquids expand in direct proportion to their change in temperature when heated. While many liquids exhibit a general trend of thermal expansion, the relationship is not strictly proportional over all temperature ranges for all liquids.

For instance, the volumetric expansion of liquids can vary based on their unique physical properties and the temperature range in question. Some liquids, like mercury or certain organic solvents, may show non-linear expansion behaviors. Additionally, the exception involving water is particularly notable; water actually has a unique expansion behavior around 4 degrees Celsius, where it contracts instead of expanding as it cools.

Therefore, the assertion that all liquids expand proportionally except for water does not hold true because of these varying characteristics of different liquids, which leads to the conclusion that the statement is indeed false.